Electro Hardware S537-M07-F16-G Circuit Board Spacer

Product Description

The ELECTRO HARDWARE S537-M07-F16-G is a round, female unthreaded circuit board spacer machined from 18-8 / 303 stainless steel and left uncoated. It measures 0.625 inches overall length with a 0.25-inch outside diameter and a 0.141-inch inside diameter sized for a No. 6 screw. The unthreaded female bore accepts a No. 6 fastener to stack, offset, or mount printed circuit boards at a fixed standoff height. This spacer meets fastener standard QQ-S-763 and is well suited for electronics assemblies in HVAC controls, industrial panels, and other trade equipment requiring corrosion-resistant hardware.

This spacer is used wherever a precise 5/8-inch standoff is needed between a circuit board and a mounting surface or between stacked boards. Typical applications include control board mounting in residential and light-commercial HVAC equipment, electrical enclosures, and industrial automation panels. The stainless steel construction makes it appropriate for environments with moderate moisture exposure where a zinc or steel spacer would corrode. It installs with standard No. 6 machine screws and is sold individually.

Key Features

• 18-8 / 303 stainless steel construction provides corrosion resistance without a surface coating
• Female unthreaded bore accepts No. 6 screws for straightforward board mounting
• 0.625-inch overall length sets a consistent standoff height between board and surface
• 0.25-inch outside diameter fits standard PCB mounting hole patterns
• Meets QQ-S-763 fastener standard for material traceability
• Uncoated finish eliminates risk of coating interference with grounded assemblies

Compatibility

Designed as an OEM-style replacement or maintenance-supply spacer for circuit board standoff applications requiring a female unthreaded No. 6 round spacer with a 5/8-inch overall length.

Installation Notes

This spacer is installed by electricians, electronics technicians, and HVAC controls technicians. De-energize and lock out all power to the equipment before removing or reinstalling any circuit board or associated hardware. Use a properly sized No. 6 machine screw and avoid overtightening, which can crack the PCB substrate. Follow applicable NEC guidelines for work inside electrical enclosures.